煤气化半焦增压流化床燃烧特性中试试验研究  被引量:10

An Experimental Study of the Combustion Characteristics of Coal Gasification Semi-coke in a Pilot-scale Pressurized Fluidized Bed

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作  者:熊源泉[1] 郑守忠 金保升[1] 肖睿[1] 

机构地区:[1]东南大学热能工程研究所洁净煤发电及燃烧技术教育部重点实验室,江苏南京210096 [2]中国水利电力物资有限公司,北京100053

出  处:《热能动力工程》2007年第2期154-157,共4页Journal of Engineering for Thermal Energy and Power

基  金:国家重点基础研究基金资助项目(G199902210535;2004CB217702-03)

摘  要:在热输入为1 MW增压流化床燃烧中试试验装置上,对加压煤部分气化得到的气化半焦进行了加压燃烧试验研究。试验结果表明,煤气化半焦增压流化床燃烧中试装置的各分系统设计合理,全系统能协调、稳定运行。在燃烧室压力0.5 MPa,燃烧温度900℃,过剩空气系数1.2~1.3,流化速度1.1~1.2 m/s条件下,半焦的燃烧效率达到99%以上,飞灰含碳量在2%以下;此外,还发现适当提高半焦燃烧的床温和一个适宜的空气过剩系数有利于半焦的充分、稳定燃烧,而飞灰循环对提高半焦燃烧效率非常有益。On the pilot-scale test run device of a pressurized fluidized bed with a thermal input of 1 MW,an experimental study of pressurized combustion has been conducted of the semi-coke obtained from the partial gasification of coal.The test results show that various sub-systems in the pilot-test run device for the coal gasification semi-coke are rational in design and the whole system can ensure a harmonious and reliable operation.Under the condition featuring a pressure of 0.5 MPa in the combustion chamber,a combustion temperature of 900 ℃,excess air ratio of 1.2 to 1.3 and fluidized speed of 1.1 to 1.2 m/s,the combustion efficiency of the semi-coke can exceed 99% with the carbon content of fly ash being below 2%.In addition,it has been also found that properly raising the bed temperature for semi-coke combustion and employing a suitable excess air ratio will contribute to a complete and steady combustion of the semi-coke while the circulation of the fly ash can be very beneficial to enhancing semi-coke combustion efficiency.

关 键 词:半焦 燃烧 增压流化床 煤部分气化 床温 

分 类 号:TQ534[化学工程—煤化学工程]

 

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